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The Smithfield Street Bridge is a lenticular truss bridge crossing the Monongahela River in Pittsburgh, Pennsylvania, USA. The bridge was designed by Gustav Lindenthal, the engineer who later designed the Hell Gate Bridge in New York City. The Smithfield Street Bridge was built between 1881 and 1883, opening for traffic on March 19, 1883.
In 1859, the second Sixth Street Bridge was built by John A. Roebling. This was his third and final bridge in Pittsburgh. His eldest son Washington Roebling worked with him on the bridge after completing his degree in engineering. This bridge had two main spans of 343 feet (105 m), with shore spans of 179 feet (55 m). [3]
John Augustus Roebling (born Johann August Röbling; June 12, 1806 – July 22, 1869) was a German-born American civil engineer. [1] He designed and built wire rope suspension bridges, in particular the Brooklyn Bridge, which has been designated as a National Historic Landmark and a National Historic Civil Engineering Landmark.
A two-lane bridge collapsed in Pittsburgh Friday, prompting rescuers to form a human chain to help rescue multiple people from a dangling bus. (Jan. 28)
The Allegheny Aqueduct was John A. Roebling's first wire cable suspension bridge. [1] It was built in 1844 near the later Fort Wayne Railroad Bridge as a replacement for a wooden covered bridge aqueduct over the Allegheny River in Pittsburgh, part of the Pennsylvania Canal.
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The bridge was then rebuilt in 1846 in an updated, wire rope Suspension Bridge construction, designed by John A. Roebling. The Liberty Bridge was built in 1928 and was designed by George S. Richardson. This bridge, which crosses over the South Side area, connects downtown Pittsburgh to the Liberty Tunnel.